#container {
    min-height:100%;
    position:relative;
}
#header {
    background-color: whitesmoke;
    padding:10px;
    position: relative;
    height: 17px;
    width: 98%;
    border: ridge;
    border-width:2px;
}
#body {
    padding:10px;
    padding-bottom:60px;   /* Height of the footer */
}
#footer {
    position:absolute;
    bottom:0;
    width:100%;
    height:60px;   /* Height of the footer */

}

#leftmenu{
    left: 0;
    position: relative;
    width: 9%;
    height: 100%;
    margin-right: 1%;
    float: left;

}
#contenido{
    position: relative;
    left: 10%;
    width: 90%;


}

#opcion1{
    position: absolute;
    left: 11%;
    bottom:  8%;
    height: 25px;
    width: 66px;    
}
#opcion2{
    position: absolute;
    left: 37%;
    bottom:  8%;
    height: 25px;
    width: 66px;   
}
#opcion3{
    position: absolute;
    left: 61%;
    bottom:  8%;
    height: 25px;
    width: 66px; 
}
#opcion4{
    position: absolute;
    left: 87%;
    bottom:  8%;
    height: 25px;
    width: 66px;  
}

.btn{

    border-style:outset;
    border-width:3px;
}